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Assertion (A): Silicon is less sensitive to changes in temperature than germanium. Reason (R): It is more difficult to produce minority carriers in silicon than in germanium. | |
A. | Both A and R are true and R is correct explanation of A [Correct Answer] |
B. | Both A and R are true but R is not a correct explanation of A [Wrong Answer] |
C. | A is true but R is false [Wrong Answer] |
D. | A is false but R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Which of these commutation methods uses an external pulse for commutation?
Class A
Class C
Class E
Class F
⇒ The two pressure coils in a single phase power factor meter of turns
the same dimension and the same numbers of turns
the same dimension but different number of turns
different dimension and different numbers of turns
different dimension but the same numbers of turns
⇒ The V MOS can handle __________ currents than a conventional MOSFET.
much lower
almost same
almost half
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⇒
A-1, B-2, C-3, D-4
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A-3, B-4, C-2, D-1
A-4, B-3, C-2, D-1
⇒
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Both A and R are true but R is not correct explanation of A
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⇒ The first and second subscripts in models of circular waveguides depict
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⇒ If resistance is 20 Ω and inductance is 2 H in a R-L series circuit, then time constant of this will be
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⇒ Which of these commutation methods uses an external pulse for commutation?
Class A
Class C
Class E
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⇒ The two pressure coils in a single phase power factor meter of turns
the same dimension and the same numbers of turns
the same dimension but different number of turns
different dimension and different numbers of turns
different dimension but the same numbers of turns
⇒ The V MOS can handle __________ currents than a conventional MOSFET.
much lower
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B. | CB amplifier | 2. | A CS amplifier driving a CG amplifier |
C. | Cascade amplifier | 3. | A circuit with over-all voltage gain close to 1 and very large input impedance |
D. | Complementary symmetry amplifier | 4. | A circuit with low input impedance |
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⇒
Assertion (A): Magnetic susceptibility of copper is -0.5 x 10^{-5}.
Reason (R): Copper is diamagnetic material.
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A is true but R is false
A is false but R is true
⇒ In the above case the total power in the modulated wave double sideband, suppressed carrier AM will be
112 W
400 W
415 W
512 W
⇒ The first and second subscripts in models of circular waveguides depict
the number of full sine wave variations in circumference in direction and Bessel function variations in radial direction respectively
the Bessel function variations in radial direction and the number of full sine wave variations in circumference direction respectively
the Bessel function variations in circumference direction and number of full sine wave variations in radial direction respectively
none of the above
⇒ The digit F in hexadecimal system is equivalent to number __________ in decimal system.
16
15
17
8
⇒ If e = 10 sin(10^{8} t + 3 sin 10^{4} t) then modulating frequency is
159 Hz
1590 Hz
1.59 MHz
15.9 MHz
⇒ Thyristors are suitable for dc circuit breakers but not for ac circuit breakers.
TRUE
FALSE
⇒ The binary equivalent of 4096.90625 is
1000000000000.11
10000000000001.1
1000000000001.1
1000000000000.1
⇒ FM signal can be generated by
diode reactance modulator
saturable reactor modulator
reactance tube modulator
none of the above
⇒ The 4 point Discrete Fourier Transform (DFT) of a discrete time sequence {1, 0, 2, 3} is
[0, - 2 + 2j, 2, - 2 - 2j]
[2, 2 + 2j, 6, 2 - 2j]
[6, 1 - 3j, 2, 1 + 3]
[6, - 1 + 3j, 0, - 1 - 3j]
⇒ For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is give
A + (B + C) D
A + BC + D
A(BC + D)
none of these
⇒ In a satellite system circular polarization is to be obtained. The antenna used is
parabolic
horn
log periodic
helical
⇒ The circuit shown in the figure has 4 boxes each described by inputs P, Q, R and outputs Y, Z
4 bit adder giving P + Q
4 bit subtractor giving P - Q
4 bit subtractor giving Q - P
4 bit adder giving P + Q + R
⇒ Dielectric constant and conductivity of rocky soil and flat sandy soil are around
10 and 20 mho/cm respectively
20 and 10 mho/cm respectively
2 and 5 mho/cm respectively
0.5 and 2 mho/cm respectively
⇒ The minimum number of 2 input NAND gates required to implement Boolean function A B C is A, B, C are available is
2
3
5
6
⇒ Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called
Debye temperature
Curie temperature
Neel temperature
Transition temperature
⇒ The echo heard by a telephone user on a satellite channel can be removed by using
a vocoder
a multiplexer
echo suppressor
digital techniques
⇒ In the signal flow graph of figure, y/x equ
3
42857
2
None of the above
⇒ The measurement of Hall coefficient of a semiconductor with one type of charge carriers gives the information about
sign of charge carrier
density of charge carrier
both sign and density of charge carrier
none of the above
⇒ In the expression 3 * * 2 ** 4 ** 2 in FORTRAN 77 which exponentiation is performed first
4 * * 2
2 * * 4
3 * * 2
all exponentiation are performed together
⇒ If F_{n} represents Fourier series coefficient of f(t), then Fourier series coefficient of f(t + t) =
F_{n}e ^{-jω}_{0}^{t}
F_{n}e ^{jω}_{0}^{t}
F_{n}e ^{jnω}_{0}^{t}
F_{n}e ^{-jnω}_{0}^{t}
⇒ In microwave communication, some times, microwave signals reach large distances by following the earth curvature. This phenomenon is called
tropospheric scatter
faraday effect
ionospheric reflection
ducting
⇒ If A = 131 ± 4 and B = 106 ± 4, the percentage range of doubt in A - B is
0.04
0.08
0.16
0.32
⇒ In steady state condition inductor behave as
open circuit
short circuit
current source
voltage source
⇒ When an electric field E is applied to solid and liquid insulating materials, the internal field E_{i} acting at the location of atom is such that
E_{i} = E
E_{i} > E
E_{i} < E
E_{i} may be equal to or less than E
⇒ 100101_{2} is equal to decimal number
47
37
21
17
⇒ If resistance is 20 Ω and inductance is 2 H in a R-L series circuit, then time constant of this will be
0.001 s
0.1 s
10 s
100 s